1. Division of Biological Science, Graduate School of Science, Nagoya University, Furo, Chikusa, Nagoya 464‐8602, Japan
2. Computational Biology, Graduate School of Humanities and Sciences, Ochanomizu University, 2‐1‐1 Otsuka, Bunkyo, Tokyo 112‐8610, Japan
3. Center for Informational Biology, Ochanomizu University, 2‐1‐1 Otsuka, Bunkyo, Tokyo 112‐8610, Japan
4. Oasis Daini Hospital, 2‐3‐30 Higasi‐Tsurusaki, Ooita 870‐0103, Japan
5. Department of Bioscience, Faculty of Bioscience, Nagahama Institute of Bio‐Science and Technology, 1266 Tamura, Nagahama, Shiga 526‐0829, Japan
6. Tokyo Medical and Dental University, 1‐5‐45 Yushima, Bunkyo, Tokyo 113‐8510, Japan
7. Research Organization of Information and Systems, 4‐3‐13, Toranomon, Minato, Tokyo 105‐0001, Japan